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- // SPDX-License-Identifier: GPL-2.0-only
- /*
- * drivers/ata/pata_palmld.c
- *
- * Driver for IDE channel in Palm LifeDrive
- *
- * Based on research of:
- * Alex Osborne <[email protected]>
- *
- * Rewrite for mainline:
- * Marek Vasut <[email protected]>
- *
- * Rewritten version based on pata_ixp4xx_cf.c:
- * ixp4xx PATA/Compact Flash driver
- * Copyright (C) 2006-07 Tower Technologies
- * Author: Alessandro Zummo <[email protected]>
- */
- #include <linux/kernel.h>
- #include <linux/module.h>
- #include <linux/libata.h>
- #include <linux/irq.h>
- #include <linux/platform_device.h>
- #include <linux/delay.h>
- #include <linux/gpio/consumer.h>
- #include <scsi/scsi_host.h>
- #define DRV_NAME "pata_palmld"
- struct palmld_pata {
- struct ata_host *host;
- struct gpio_desc *power;
- struct gpio_desc *reset;
- };
- static struct scsi_host_template palmld_sht = {
- ATA_PIO_SHT(DRV_NAME),
- };
- static struct ata_port_operations palmld_port_ops = {
- .inherits = &ata_sff_port_ops,
- .sff_data_xfer = ata_sff_data_xfer32,
- .cable_detect = ata_cable_40wire,
- };
- static int palmld_pata_probe(struct platform_device *pdev)
- {
- struct palmld_pata *lda;
- struct ata_port *ap;
- void __iomem *mem;
- struct device *dev = &pdev->dev;
- int ret;
- lda = devm_kzalloc(dev, sizeof(*lda), GFP_KERNEL);
- if (!lda)
- return -ENOMEM;
- /* allocate host */
- lda->host = ata_host_alloc(dev, 1);
- if (!lda->host)
- return -ENOMEM;
- /* remap drive's physical memory address */
- mem = devm_platform_ioremap_resource(pdev, 0);
- if (IS_ERR(mem))
- return PTR_ERR(mem);
- /* request and activate power and reset GPIOs */
- lda->power = devm_gpiod_get(dev, "power", GPIOD_OUT_HIGH);
- if (IS_ERR(lda->power))
- return PTR_ERR(lda->power);
- lda->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
- if (IS_ERR(lda->reset)) {
- gpiod_set_value(lda->power, 0);
- return PTR_ERR(lda->reset);
- }
- /* Assert reset to reset the drive */
- gpiod_set_value(lda->reset, 1);
- msleep(30);
- gpiod_set_value(lda->reset, 0);
- msleep(30);
- /* setup the ata port */
- ap = lda->host->ports[0];
- ap->ops = &palmld_port_ops;
- ap->pio_mask = ATA_PIO4;
- ap->flags |= ATA_FLAG_PIO_POLLING;
- /* memory mapping voodoo */
- ap->ioaddr.cmd_addr = mem + 0x10;
- ap->ioaddr.altstatus_addr = mem + 0xe;
- ap->ioaddr.ctl_addr = mem + 0xe;
- /* start the port */
- ata_sff_std_ports(&ap->ioaddr);
- /* activate host */
- ret = ata_host_activate(lda->host, 0, NULL, IRQF_TRIGGER_RISING,
- &palmld_sht);
- /* power down on failure */
- if (ret) {
- gpiod_set_value(lda->power, 0);
- return ret;
- }
- platform_set_drvdata(pdev, lda);
- return 0;
- }
- static int palmld_pata_remove(struct platform_device *pdev)
- {
- struct palmld_pata *lda = platform_get_drvdata(pdev);
- ata_platform_remove_one(pdev);
- /* power down the HDD */
- gpiod_set_value(lda->power, 0);
- return 0;
- }
- static struct platform_driver palmld_pata_platform_driver = {
- .driver = {
- .name = DRV_NAME,
- },
- .probe = palmld_pata_probe,
- .remove = palmld_pata_remove,
- };
- module_platform_driver(palmld_pata_platform_driver);
- MODULE_AUTHOR("Marek Vasut <[email protected]>");
- MODULE_DESCRIPTION("PalmLD PATA driver");
- MODULE_LICENSE("GPL");
- MODULE_ALIAS("platform:" DRV_NAME);
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